Lithographic-stone-surfacing machine.



Patented Dec. 26, I899.

c. a. WARNER.

LITHOGBAPHIC STONE SURFABING MACHINE.

(Application filed June 2, 1899.) (No Model.) 6 Sheets-Sheet L OM44 mATTORNEY.

No. 639,953. Patented Dec. 26, I899. C. G. WARNER,

LITHOGRAEHIG STONE SURFACING MACHINE.

(Application filed June 2, 1899.) (No Model.) 6 Sheets-Sheet 2.

I WITNESSES: l/VV N701? 2001M fim ATTORNEY.

TH: "cams vz'rzns co rioroumou WASHINGTON, n c

No. 639,953. Patented Dec. 26, I899. C. G. WARNER.

LITHOGRAPHIC STONE SURFACING l'llAGHlNE.

(Application filed June 2, 1899.) (No Model.) 6 Sheets-Sheet 3.

llllllllllllllll WITNESSES: M/l/E/VTUR @1163; o/m/w ATTORNEY.

No. 639,953. Patented Dec. 26, 1899. C. G. WARNER.

LITHOGBAPHIC STONE SURFACING MACHINE.

(Application filed June 2, 1899.) (No Model.) B Sheets-Sheet 4 PatentedDec. 25, I899.

No. 639,953. v

G. G. WARNER.

LITHOGR'APHIC STONE SURFACING l'llAGHlNE.

(Application filed June 2, 1899.) (No Model.)

6 Sheets-Sheet 5.

No. 639,953. Patented Dec. 26, I899. C. G. WARNER.

LITHOGRAPHIC STONE SURFACING MACHINE.

I (Application filed June 2, 1899.) (No Model.) 6 Sheets$heet 6,

9 e I a v W/T/VESSES: INVENTOR,

%.d/. By 2 ATTORNEY.

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.. rrED STA FFICE.

PATEN CLARENDON G. WARNER, OF HOLYOKE, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 639,953, dated December26, 1899.

Application filed June 2, 1899. Serial No. 719,156. (No model.)

To all whom it may concern.-

Be it known that I, CLARENDON G. WARNER, a citizen of the United Statesof America, and a resident of Holyoke, in the county of Hampden andState of Massachusetts, have invented certain new and usefulImprovements in Lithographic-Stone-Surfacing Machines, of which thefollowing is a full, clear, and exact description.

This invention relates to machines for re surfacing lithographic stoneswhich have been once used, so as to erase the engraving or transfer ordrawings thereon and leave the working face or side thereof perfectlyflat and smooth and in readiness for use for the next engraving,transfer, or drawing.

The invention consists in a machine comprising a carrier for the stoneto be surfaced, reciprocating on a bed therefor, a roughingwheel to theaction of which the top of the stone is subjected, a further wheel orset of wheels of finer character, to the further action of which thestone is subjected, and in combination therewith afinal polishing Wheelor wheels reciprocating transversely and horizontally in a linetransversely of the movement of the work on the bed.

The invention, furthermore, consists in novel means whereby thesurfacing-Wheels may be individually raised or lowered or all those ofone set or series raised or lowered in unison; to means whereby thesurfacingwheels of the set may be, as desired, approached or separated,their axes being ever retained parallel to accord with the surfacing ornarrower or wider stones to be worked upon.

The invention, furthermore, consists in the means for rotating the twoor more surfacingwheels of a set or series; to means for traversing suchwheels bodily; to means for rendering the surfacing-wheel temporarilynonrotatable in conjunction with the means for rendering temporarily, asdesired, the trav ersing mechanism inoperative.

The invention, furthermore, consists in the means for supplying water tothe working faces or portions of the surfacingwheels, means forautomatically supplying powdered pumice-stone or other polishing-powderon the face of the lithographic stone at the part thereof overlaid andbeing operated upon by the surfacing, smoothing, or polishing wheels;and the invention, furthermore, consists in various constructions andcombinations of parts, all substantially as hereinafter described, andset forth in the claims.

This improved machine is fully and clearly to the view Fig. 3 looking atthe right-hand end thereof. Fig. 5 is a plan and horizontal sectionalview of the device which ships and unships the traversing mechanism forthe surfacing-wheels. Fig. 6 is a plan and partial horizontal section ofthe traversingwheel. Fig. 7 is a vertical partial sectional view andpartial elevation of one of the surfacing-wheel shafts, the gearingtherefor, and other devices to be hereinafter referred to.

Fig. 8 is a side elevation in part and a vertical sectional viewin partof the mechanism shown in Fig. 7, but taken at right angles thereto.Fig. 9 is a vertical sectional view on line 9 9, Fig. 7. Fig. 10 is adetail view in elevation of a device to be hereinafter referred to. Fig.11 isa plan view of one of the surfacingwheels. Fig. 12 is a verticalsectional view taken on line 12 12, Fig. 11. Fig. 13 is a view similarto Fig. 12, but taken at right angles thereto and showing at the bottomthereof the final polishing appliance. Fig. 14 is a plan view at theunder side of the surfacingwheel shown in Figs. 11 and 12. Fig. 15 isplan view of the under side of the final 'polishing-wheel, of which inthis machine there are two or more. Figs. 16 and 17 are respectivelycentral vertical sectional and side views of the receptacle which iscarried by and agitated in relation to each of the surfacing-wheels forcontaining and discharging therefrom ground pumice-stone or othersuitable polishing-powder. Fig. 18 is a view of a group of parts indetail hereinafter individually referred to. Fig. 19 is a plan view ofthe under side of the large roughing-wheel.

Fig. 20 is a cross-sectional view of the same as taken on the line 2020. Fig. 21 is a perspective view of one of the abrading sections orsegments, of which there are a series comprised in the said wheel.

Similar characters of reference indicate corresponding parts in all ofthe views.

In the drawings, A represents the bed of the machine, havinglongitudinal ways 25, along which is guided the carriage B, on which thelithographic stones to be surfaced are supported and confined. The bedhas a longi tudinal reciprocating motion, as ordinarily inplaning-machines, engaging which bed is the feed-screw 26, having thereversing-gearing 27, which is of a well-known character not necessaryto describe.

9 represents the driving-shaft of the machine.

At an intermediate part of the bed are the opposite standards 28 2S anda cross-tie beam 30 at the top, in which are bearings for the verticalhollow shaft 32, at the lower end of which is the rouglrgrinding orcoarse-surfacing wheel 0, arranged to rotate in a horizontal planesuitably above the bed, the same being rotated by the belt 0 which runsfrom the pulley 8 on the main shaft 9 around the pulley O on thevertical grinding-wheel shaft 32. This grinding-wheel shaft and thewheel carried thereby are vertically adjustable, having adj usting meansinvolvingno novelty, but indicated partially at 33, and will be hereinreferred to in a general way only as comprising the horizontal shaft 34at the top gearinginto vertical shafts 35 35, which have screw orequivalent engagements with the vertically-adj ustahle support for thewheel 0, a vertically-adj ustable grinding-wheel whereby its horizontalworking face may be disposed more or less nearly to the level of thecarriage, being common and well known in various machines of thisgeneral character. Further endwise, beyond the roughing-wheel C, areopposite standards 36, supporting between them the transverse elevatedhorizontal girder-frame D, the opposite sides of which constitute waysfor sliding movements of the carrier respectively provided for each ofthe two series of surfacing-wheels, the shafts on which they aresupported, and the rotary driving means therefor.

E Erepresent the first series of the surfac ing-wheels next endwisebeyond the roughing-wheel C, they being arranged axially with theirvertical carrying-shafts E in a common plane which is vertical andtransverse in relation to the length of the bed.' G G represent asimilarly-arranged pair or series of surfacingwvheels next endwisebeyond but comparatively close to the wheels E, being only at theopposite side of the supporting and guiding girder-frame D.

H represents one of the individual carriers for the surfacing-wheelshaft E the same having dovetail ways 39, which embrace for thetransverse horizontal sliding motion the shoulder 40, which engages theupper end of p the secondary carrier J. Each carrier is constructed withrack-teeth 42.

Supported in suitable fixed bearings is the horizontal shaft L, rangingtransversely relatively and in common to the series of secondarycarriers J, this shaft being splined, as seen at 43, and a gear-wheel 44has a spline engagement to rotate with and to move endwise along saidshaft L. Each gear-wheel is located within a yoke or housing 45, whichis projected at the front of the carrier H, the same straddling over andbeing free from the carrier J, said gear having the elongated hub 46,provided with the two annular grooves 47 and 48. One side of the housing45 for the said gear-wheel 44 is recessed, as shown at 50, so that thesaid gear-wheel and its hub may he slid endwise along the shaft, wherebythe gear-wheel may be in or out of mesh with the rack 42 of thesecondary carrier.

52 represents a hinged retainer adapted to be swung down into engagementwith either the groove 48 or the groove 47, so as to hold the gear inits proper transversely-arranged position to mesh or be out of mesh, asdesired, with the rack.

L represents a hand-wheel, by means of which to turn the shaft L for thepurpose of raising and lowering through the gearing and secondarycarriers, or all of those with which the gears 44 are in mesh, andthrough the carriers engaging the surfacing-wheel shafts E the raisingof such shafts and the surfacing-wheel carried at the lower end thereofor permitting the lowering of such shafts by the weight thereof and ofthe wheels carried thereby. These arrangements last described permit, asindicated in Fig. 2, that one of the series of the wheels may be raisedabove the working level or that one or more of the series may beindividually raised above such level, it being understood that such ofthe surfacing-wheels as have the gear-wheel 44 left in mesh with theracks provided on the secondary carriers corresponding respectively tothe surfacing-wheels will on the turning of the shaft L be raised; butin order to insure that on the turning of said shaft L an individual oneof the surfacing-wheels E will remain in its lowered working position itis only necessary to slide the gear-wheel 44 corresponding to suchsurfacing wheel along the shaft L, whereupon the rotational movementimparted to such shaft will be without effect to change the position ofthe grinding or surfacing wheel.

At 52 in Fig. 9 is shown a snap-latch to en gage the rack-teeth of thesecondary carrier, so that when the latter has been elevated it will beretained in its elevated position, this device being readily withdrawnwhen desired,

from its engagement to permit the secondary carrier and its shaft to belowered.

Supported on the primary carrier H for each surfacing-wheel shaft E in asuitable journal-bearing 53 therefor is a bevel gearwheel 54, the samehaving a spline engagement, as indicated at 55, Fig. 9, with thesurfacing-wheel shaft E whereby the latter may play vertically throughthe gear-wheel individually engaged therewith and through which suchshaft is rotated.

Rangin g transversely above the upper ends of the series ofsurfacing-wheel shafts E is the horizontal shaft M, splined on which arethe several bevel gear-wheels 56. This shaft 56 is driven, primarily,from the main driving-shaft 9 of the machine through driving mechanismas follows: A gear-wheel 20 is mounted on the end portion of said shaftM, meshing with which is a gear-wheel on a short horizontal shaft 22,located at the rear side of the machine, this short shaft 22 havingthereon the bevel gear-wheel 23, which is in mesh with bevel gea-rwheel24 on the vertical shaft 10, having thereon the pulley 19, (indi catedby dotted lines in the plan view,) and driven by the belt 18, runningfrom a pulley on the aforesaid main driving-shaft 9.

Each primary carrier H for a surfacingwheel. E has at its rear side,within the coredout part of the transverse girder-frame D, the earpieceor projection 60, and through the several of these projections thesingle screwshaft it engages, the same being provided with a hand-wheelk or other suitable means for turning it, so that the outer carriers Hof the series of three for the surfacing-wheels E E E may be movedinwardly towardor outwardly from the middle one of these wheels, thethreads at the opposite end portions of this screw-shaft beingreversed-that is, the said shaft has thereon right and left handscrew-threads.

A traversing motion is imparted to the several primary carriers for theseries. of surfacin g-wheels, which carriers, through the aforesaidscrew-shaft which engages them, are united to move in unisontransversely, and this traversing motion is imparted by the rotation ofthe wheel f which has the eccentric-pin 62, connecting with which is thepitman or connecting-rod 63, which is secured to one of the carriers H.meshes into the gear-wheel f this wheel being mounted on a short shaft11, the line of which is longitudinally of the machine, and this shaft11 has at its inner end the gearwheel 12, which is in mesh with thebevel gear-wheel 13 at the lower end of the aforementioned verticalshaft 10, to which latter shaft the rotary motion is imparted by thebelt and pulley, as aforementioned.

At the time the roughing-wheel is being used on the work (lithographicstone carried on the longitudinally reciprocating bed B) it is notdesired to rotate the surfacing-wheels E or to traverse them, and I haveprovided means The gear-wheel f whereby the shaft M, having the gearingconnections in common with the several surfacing-wheel shafts E maycease its rotation and whereby the gear-wheels f and f may be stopped toinsure a cessation of the traversing action.

a represents a push-rod ranging transversely of the machine, the samebeing supported for its horizontal sliding movements in an upper part ofthe cross girder-framing D, this carrying at its rear end the arm oryoke 61, which embraces the clutch member 64, which slides on the shaftM, it being understood that the clutch member 64 is splined on the shaftand that the gear-wheel 2O rotates independently of said shaft M. Therotation of said gear-wheel will not cause the turning of the shaftunless the clutch is in. Operating in conjunction with thisclutchactuating push-rod is a clutch-operating mechanism for throwingthe gear-wheel f into and out of clutch engagement with the shaft 11,which has the continuous rotation, so that when the gear-wheel f is outof clutch the traversing motion will be stopped. Located below thepush-rod suitably adjacent the shaft 11 is a slide-bar 9, having aninclined end portion provided with a cam-slot c. Engaging in thiscam-slot is a depending pin or stud b, which is affixed as a rigid partto the push-rod a. Said bar 9 is constrained to move in a straight linebecause of the guide 51. (See Fig. 5.) This bar is connected to aclutch-operating lever or arm 65, the same being shown as pivoted at 66to the short stud or fixture 67.

68 represents the clutch proper, having a spline engagement on the shaft11, around which the gear f turns, said gear not being affixed to theshaft, but having an independent journal-bearing.

By throwing the clutch 68 out of engagement with the hub of the gear fthe rotation of the shaft 11 will be without effect to turn said gear,and consequently to drive the traversing-gearf and hence at the sametime the driving-gear 20 is out of clutch with the shaft M the shaft fwill also be out of clutch with the shaft 11, driven as aforesaid, whichsaid gear f when driven drives the traversinggear f The set ofsurfacingwheels G, two of which are shown in the plan view, Fig. 1, atthe side of the upright framing ofthe machine toward the left-hand endof the latter, are respectively provided with carrying-shafts G havingcombined therewith the secondary carriers J mounted on primary carriersH which slide on the transverse girder-frame D in precisely the samemanner as the carriers H, already described, and each of these secondarycarriers J 2 has the rack-teeth 42, meshing with each of which is agear-wheel 44, arranged on the horizontal shaft L and adapted to be slidin and out of mesh with the adjacent rack-teeth on the supplementalcarrier, so that these shafts and surfacingwheels may be both or eitherof them elevated above the working level.

The right and left hand screw-shaft 71. is understood as applied in thesame manner as the one it for bringing the surfacing-wheels and theirshafts in axial proximity or greater separation, as may be desired, andthe bevelgearing 53 54 is duplicated and arranged at the upper ends ofeach of the shafts G so that whether the shafts are approached orarranged in greater distention their driving engagments remain intact,and in conjunction with the shaft M arranged similarly to the one M, isthe gear-wheel 20, combined with which is the clutch 64:, operated byduplication of the same clutching and unclutching mechanism as describedin conjunction with the gearwheel 20, and the traversing-gear f issuitably arranged opposite the one f and has combined therewith theconnecting-rod 63, which also has connection with the two primarycarriers H connected by the screw-shaft, as aforesaid, so that thesurfacing-wheels G G are traversed relatively to the longitudinallyhorizontally reciprocating work the same as the wheels E E, and inconjunction with the traversing-gear f 20 and a gear f, like theaforesaid gear f, is the clutch 68, the pushrod a stud b andclutch-operating device g which is a counterpart of that shown in Fig. 5and already described.

All of the shafts E and G are constructed hollow or tubular from end toend, and extending down within each is a vertical waterpipe 1',terminating at or near the bottom of the annular surfacing-wheel, thesepipes being respectively supported by brackets 2' as shown in Fig. 2only. The upper ends of these water-pipes are provided with funnels ileading into which are flexible sections of hose-pipe 1' extended fromthe main supplypipe 70, which is suitably supported from the overheadflooring or any available supporting structure, and cocks k are providedfor the individual conduits, so that the water may be turned onto or offfrom each tubular conductor for the respective verticalsurfacingwheel-carrying shafts. The roughing-wheel O has its verticalhollow shaft 12 also internally provided with a water-supply pipe m, thesame being supported adjustably as to height by the set-screw 117?,which screws through the bracket m at the top of the supporting-frame orcarrier for the shaft of the roughing-wheel. The said water-pipe m hasat its upper end the flexible conduit-section m, which is coupled to theoverhead supply-pipe 7c. The lower end of the pipe m has radialhorizontal branches m which connect the pipe m, in the manner of thespokes of a wheel, with the annular pipe m", which is thereby supportedwithin the grinding or abrading sections which constitute the annularsurfacpoints around the circular working edge of the roughing-wheel.

Each of the surfacing wheels E is constructed with a circular carrier orbody 01, which may advantageously be made of castiron, and this bodyisso engaged on the lower end of the vertical shaft E, therefore, that itmay have a slight degree of lost motion or play relatively to its shaft,so as to conform to the level surface of the stone being worked upon andyet so that the rotary motion of the shaft will rotate thesurfacing-wheel and also so that the lifting motion in any considerableextent imparted to the shaft by the means hereinbefore described willelevate the surfacing-wheel clear from its work. This connection isconstituted by forming the body of the surfacing-wheel with a squaredmortise 0, extending vertically and centrally from its top, while thelower end of the carrying-shaft E (or G for both sets of wheels E and Gare mounted at the lower ends of the carryingshafts E and G2 in similarmanner) is constructed with a solidly-formed or rigidly-connected tenont, which is sunk within the mortise and is overlaid by the retaining-capq.

Detachably connected with the surfacingwheel body is the annular carrier3 for the series of surfacing-sections of abrading material with whichsaid carrier is provided at its under side. Said carrier has dowel andsocket engagements with the body, as indicated at 3 retaining or setscrews 3 engaging the dowels, the same being provided to penetrate thebody of the carrier from its periphery.

The carrier of the surfacing-wheels E is constructed with the dependingannular flange 70, formed with a series of radial recesses or pockets72, opening at the bottom of said flange, and in these pockets, whichalso open radially at the outer periphery of the flange, are the blocksor sections 75 t, of rectangular form, and which may be of any materialor combinations of materials to constitute an abrading medium havingfitness to the purpose. These blocks may advantageously be made oflayers 7 3 of wood or leather or wood and leather or other material offine grain or texture, having their adjoining faces surfaced with glue,which glue before the so-surfaced layers are placed together and clampedis liberally sprinkled with emery, so that the finished block if isconstituted with strata of ground emery or like gritty material, whichin use exerts a very good surfacing action on a lithographic stone. goodsurfacing capability even after having been considerably worn away,always presenting at its Working face the combination of thecomparatively smooth grained and more gritty substances. These blocksare crowded into place tightly within the radial recesses therefor andare held against displacement by reason of their crowding fit, which ismaterially increased by the expand- ICC This block retains its ingefiect of the water copiously applied in the surfacing operations of themachine.

Inasmuch as the abrading sections or blocks, the lower edges of whichprotrude beyond the base of the flange 70, become finally uniformlyreduced and worn away, they are downwardly crowded to compensate for thewear by inserting thin strips 75, of wood or other suitable material, inthe top walls of the recesses 72, andin order to render this easy theouter corners of the recesses are beveled, as shown at 76, and the saidstrips are formed with their entering ends beveled orchisel-shaped,whereby they may be entered to their crowding action abovethe blocks 25.

The pair or set of wheels G G, which are designed to operate on the faceof the surface lithographic stone after the same has previously beenreduced by the roughing-wheel and the surfacing-wheels E E, is shown ashaving a body 01 the same as and mounted on its shaft in the same manneras the body of the surfacing-wheel E, and the holder 3*,which has thedowel-and-socket engagement and setscrew confinement, as beforedescribed, is here made in the form of a disk with a small centralopening for the disposition therein of the Water-pipe, and recesses '79extend from edge to edge of the holder, and in these recesses are fittedbars or sections of the abrading material, (indicated by 25 these beingrubber in any of its elastic compounds or combinations of rubber andcloth or felt or other polishing material.

Each of the surfacing-wheels E and G is provided with a receptaclecontaining ground pumice, which receptacle is carried bodily with thestone and is adapted to be agitated for the purpose of discharging aportion of the pumice down through an opening therefor terminating atthe bottom of the stone to facilitate the surfacing and polishingeifects. Therefore it will be pointed out that each surfacing orpolishing wheel body is constructed with a socket a, which extends fromtop to bottom of the body, being also continued through the carrier orholder 8 or 8*, the lateral recess u leading radially from the socketand having its base within the thickness of the body.

Q represents a tubular receptacle for the polishing-powder, the samehaving its bottom constructed as a sprinkler by being perforated orcomposed of gauze. This receptacle at its upper end portion isshouldered,as shown at 80, so that as it is periodically elevated bymeans to be shortly described and permitted to fall it will in itsdescent, by reason of the abutment of its shoulder 80 against the bodyof the wheel, receive a shock or become agitated, causing a sifting outof the polishingpowder at the bottom.

The holder Q for the polishing-powder is provided with lateralprojection 82, which ongages in the lateral aperture to to preventrotational movement of the device Q, permitting freely, however, itsvertical play.

The receptacle Q, near its top, has a projection or cam-roller 83, whichof course revolves bodily with the surfacing-wheel, and in the path ofthis cam-roller is the cam or incline 84:, so that every time theprojection 83 reaches and impinges against the cam it must necessarilyride up thereon, elevating the receptacle, and immediately thereafter asthe projection 83 in its continued revoluble movement passes clear ofthe cam it is allowed to descend. The descent is insured forcibly andpositively by the application of the spring 85, which isfastened on thetop of the surfacingwheel body and has by its free end a downwardreaction against the stud 86, projected from the side of the upper endportion of receptacle Q.

In order that the cam may have its proper relative position to theprojection 83 on receptacle Q always the same, such cam is so arrangedas to have rising and falling movements in unison with the rising andfalling movements of the surfacing-wheel-carrying shaft in conjunctionwith whichit is arranged, and, as most clearly shown in Fig. 8, theradial arm 87 is provided to extend from tho surfacing-wheel shaft E thecircularly-apertured end of this arm being fitted about the shaft, sothat the shaft may turn freely independently of the arm. Collars 88 88are fastened on the surfacing-wheel shaft closely above and below thearm. This insures that the arm will be carried bodily vertically inunison with the shaft; but the arm may have no revoluble motion, becausethe vertical rod 89, fastened at the outer end thereof and at the lowerend of which the cam 84is provided and supported, has its upper endplaying vertically through the socket 90 in a part of the primarycarrier H.

The primary or roughing wheel 0, as more particularly shown in Figs. 19,20, and 21, will be nowdescribed. The said wheel is constructed with acast-iron body 1;, having a cir cular form, with a depending externalflange c and a depending internal flange c leaving the annular groove,which is downwardly opening between such flanges. The roughing orabrading medium consists of a series of sections to of T form incross-section and extending as to their length in an arc. These sectionsare made of granulated or pulverized emery,corundum, or equivalentabrading material molded to the form shown-that is, having the dependingcentral portion 93 and headflanges 94 94. The depending central portion93 is constructed with a multiplicity of perforations or renderedporous, as indicated at 95, and the lower edge is formed serrated, asindicated at 96, by preference, although not of necessity. Thesearc-formed and crosssectionally T-shaped abradiug-sections w are held inplace by the annular clamping-rings a; 00, which lie within theaforesaid annular groove of the roughing-wheel body to with a retainingengagement against the portions 94 94 of said sections, saidclamping-rings being confined by set screws or bolts which pass throughand with a screw engagement into the solid top of the body r. Thedepending middle part 93 of the sections to projects quite a littlebelow the body 12 of the roughingwheel. By making the sections 10 towith the interstices or pores substantially as shown such rough grindingor abrading mediums are relieved of the tendency to become glasslike orsmooth at their working edges after a short time of use and presentafter continued employment always a fresh and suitablyrough workingedge, and, furthermore, as the wheel becomes worn away by reason of theaforesaid perforations the edge successively becomes edgewise-recessed,permitting the water supplied within the wheel to flow under the workingedge.

When the depending rib-like parts of the abrading-sections w w have beenworn up closely to the bottom of the iron body 1; of thesurfacing-wheel, the clamping-rings a: a: are removed and new sectionsto w are replaced and confined, as before.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a lithographic-stone surfacing machine, in combination, the bed,the carriage for the stone to be surfaced reciprocating thereon, aroughing-wheel to the action of which the top of the stone is subjected,a f urtherwheel or wheels of finer character to the rotary action ofwhich the stone is subjected, means for rotating the roughing andsecondary surfacing-wheels, separate means for elevating and retainingraised both the roughing-wheel and the-surfacing wheel or wheels,driving connections from a common drivingshaft for said wheels, andmeans for unshipping at pleasure the connection for the secondarywheels.

2. In a lithographic-stone-surfacing machine, the combination with thereciprocatory bed, of a series of surfacing-wheels, and carrying-shaftstherefor, means for rotating the shaftsand means arranged in common tothe several shafts and having detachable con nections or engagementsindividually therewith whereby they may be, as desired, all elevated inunison or individually elevated, for the purpose set forth.

3. In a lithographic-stone-surfacing machine, the combination with thereciprocatory bed, of a series of surfacing-wheels and shafts therefor,means for rotating the shafts, and means for traversing the severalshafts and surfacing-Wheels thereof.

at. In a lithographic-stone-surfacing machine, the combination with thebed, of two or more surfacing-wheels, and upright shafts therefor, meansfor rotating said shafts, and means for causing approached or distendedrelations of said shafts, for the purpose set forth.

5. In a lithographic-stonesurfacing machine, the combination with thebed, of two or more surfacing-wheels, and upright shafts therefor, meansfor rotating said shafts,means for traversing said shafts bodily inunison, and means for causing approached or distended relations of saidshafts, for the purpose set forth.

6. In a lithographicstone-surfacing machine, the combination with thebed and an elevated transverse supporting part or framing, of theprimary carriers H horizontally movable on said transverse supportingpart, secondary carriers vertically movable on the carriers H, thesurfacing-wheel shaft vertically journaled for rotation and alsovertically movable and engaged to be moved by said secondary carrier,mechanism for imparting vertical elevating motions to said secondarycarriers, a right and left hand threaded screw-shaft, screw engaging theprimary carriers, and serving as connecting means therefor and also asmeans for causing approached and distended relations thereof, and meansfor traversing said screw-shaft-united carriers H, for the purposes setforth.

7 In a lithographic-stonesurfacing machine, in combination, the bed andcarriage movable thereon, a primary carrier transversely movable on thestationary elevated horizontally-ranging part of the machine, thesecondary carrier mounted for a vertical sliding movement on saidprimary carrier, and provided with the rack-teeth, the vertical shaftjournaled for rotation in the primary carrier, and axially movablerelatively thereto provided with an engagement-shoulder 40, the shaft Lhaving the gear-wheel 4:4 splined thereon and axially movable along saidshaft, and adapted to be placed at will in mesh. with and disengagedfrom the said rack, substantially as and for the purposes set forth.

8. In a lithographic-stone-surfacing machine, in combination, the bedand carriage movable thereon, a primary carrier transversely movable onthe stationary elevated horizontally-ranging part of the machine, thesecondary carrier mounted for a vertical sliding movement onv saidprimary carrier, and provided with the rack-teeth, the vertical shaftjournaled for rotation in the primary carrier, and axially movablerelatively thereto provided -with an engagement-shoulder 40, the shaft Lhaving the gear-wheel 4:4thereon in mesh with the rack-teeth of thesecondary carrier, means for rotating the surfacingwheel shaft and adetent for temporarily holding the secondary carrier after having beenelevated by the rotation of said shaft L and gear in its raisedposition.

9. In a lithographic-stone-surfacing machine, in combination, the bedand carriage movable thereon, and an elevated transversely-arrangedsupporting part of the framing thereabove, two or more primary carriersH transversely movable along said elevated support, secondary carriersmounted for vertical movements on the primary carriers and provided withrack-teeth, the vertical surfacing-Wheel shafts journaled for rotationin the primary carriers and axially movable relatively thereto, andmeans for rotating them, the horizontal shaft having the gear-wheels 44splined thereon and adapted to individually engage or be placed out ofengagement with said rack-teeth, and means of engagement whereby thesecondary carriers in their vertical movements insure the elevation ofthe surfacing-wheel shafts, substantially as described.

10. In a lithographic-stone-surfacing machine, in combination, the bedand carriage movable thereon, and an elevated transversely-arrangedsupporting part of the framing thereabove, two or more primary carriersII transversely movable along said elevated support, secondary carriersmounted for vertical movements on the primary carriers and provided withrack-teeth, the vertical surfacing-wheel shafts journaled for rotationin the primary carriers and axially movable relatively thereto, andhaving shoulders 40, the horizontal shaft having the gear-wheels 44splined thereon and adapted to individually engage or be placed out ofengagement with said rack-teeth, gear-wheels 54 mounted to rotate onvertical axes in said carriers H, and through which the upperextremities of the surfacing-wheel shafts are passed with a splineengagement, and means for rotating said gear-wheels 54, substantially asand for the purposes described.

11. In a lithographic-stonesurfacing machine, in combination, the bedand carriage movable thereon, and an elevated transversely-arrangedsupporting part of the framing thereabove, two or more primary carriersH transversely movable along said elevated support, secondary carriersmounted for vertical movements on the primary carriers and provided withrack-teeth, the vertical surfacing-wheel shafts journaled for rotationin the primary carriers and axially movable relatively thereto, andhaving shoulders 40, the horizontal shaft L having the gear-wheels 44splined thereon and adapted to individually engage or be placed out ofengagement with said rack-teeth, gear-wheels 54 mounted to rotate onvertical axes in said carriers H, and through which the upperextremities of the surfacing-wheel shafts are passed with a splineengagement, the shaft M having thereon several gears 56 in mesh with thegearwheels 54, and means for rotating said shaft M, for the purposes setforth.

12. In a lithographic-stonesurfacing machine, in combination, the bed,and carriage movable thereon, and an elevated transversely-arrangedsupporting part of the framing thereabove, two or more primary carriersH transversely movable along said elevated support, the verticalsurfacing-wheel shafts j ournaled for rotation in the primary carriersand axially movable relatively thereto, bevel gear-wheels 54 mounted torotate on vertical axes in'said carriers H, and through which the upperextremities of the surfacing-wheel shafts are passed with splineengagements, the horizontal shaft M having splined thereon the severalbevel-gears 56 in mesh with the bevel gear-wheels 54, means for rotatingsaid shaft M, and the right and left threaded screw-shaft engaging thecarriers H, substantially as and for the purposes described.

13. In a 1ithographic-stone-surfacing machine, a set or series of two ormore surfacing-wheels, means for rotating said wheels, means fortraversing said wheels bodily in unison, and a mechanism for renderingthe surfacing-wheels temporarily non-rotatable and for temporarilyrendering the traversing means inoperative. I v

14. In a lithographic-stone-surfacing machine, the combination with thereciprocatory work-carriage, of the vertical rotatable shaft squared ortenon-prov-ided at its lower end, the surfacing-wheel having in theupper part of its body the vertically-openin g mortise into which saidtenon is fitted and adapted for a slight vertical play, and a retainingcap or plate q secured on the top of the surfacingwheel body,substantially as described.

15. In a lithographic-stonesurfacing machine,the combination with therotatable su rfacing-wheel having a downwardly-opening passage therein,a receptacle for the polish ing-powder mounted on said surfacing-wheelhaving a sifting-bottom, and means for antomatically agitating saidreceptacle, for the purpose set forth.

16. In a lithographic-stone-surfacing machine, the combination with thesurfacingwheel, and a hollow rotatable shaft at the lower end of whichsaid wheel is provided, a water-delivering pipe provided interiorly insaid shaft and delivering the liquid to the bottom of the Wheel, areceptacle movably mounted on the wheel and having a siftingbottom, andmeans for automatically agitating said receptacle, for the purpose setforth.

17. In a lithographic-stone-surfacing machine, the combination with thesurfacingwheel having therein a seat or socket 'uand a passagedownwardly continued therefrom to the bottom of the Wheel, a cylindricalreceptacle having an apertured bottom vertically movable in said socket,and provided with a projection, a cam mounted in the path of revolutionof said projection, and adapted to be successively impinged against bythe latter, and the spring for downwardly forcing the said receptacleimmediately the cam is disengaged, for the purpose set forth.

18. In a lithographic-stone-surfacing machine, the combination with theverticallymovable and rotatable surfacing-Wheel shaft, and means forrotating said shaft, means for elevating the same, and thesurfacing-wheels provided at the bottom thereof having a passage orsocket a leading vertically therethrough, the shouldered receptacle Qhaving a Sifter-bottom fitted in said socket and provided with acam-engagement projection and IIO a downwardly-reacting spring, the arm87 loosely engaged with and radially extended from the shaft,non-rotatable relatively to but vertically movable in conjunction withsaid shaft, a vertical supporting rod or bar 89 carried by said arm andprovided at its lower portion adjacent the surfacing-wheel with the cam84:, substantially as and for the purposes set forth.

19. In a lithographic-stone-surfacing machine, a horizontalreciprocatory carriage, a roughing-wheel having an annular dependingworking face rotatably supported above the carriage, and means forrotating said wheel, and a secondary set of surfacing-wheels alsorotatably mounted above the bed at a point beyond the saidroughing-wheel each having the working bottom thereof provided with asurfacing medium of finer character than the roughing-wheel, and meansfor traversing said surfacing-wheel.

20. In a lithographic-stone-surfacing machine, a horizontalreciprocatory carriage, a roughing-wheel having an annular dependingworking face supported above the carriage, and means for rotating saidroughing-wheel, one or more secondary surfacing-wheels rotatably mountedabove the bed beyond the said roughing-wheel, each having a workingbottom of finer character than that of the roughing-Wheel, means fortraversing said surfacing-wheels, and means for elevating them, for thepurposes set forth.

21. In a lithographic-stone-surfacing machine, a bed and reciprocatingcarriage, a roughing-wheel rotatable thereover, secondary or surfacingwheels having their working bottoms of finer character than theroughingwheel arranged beyond such wheel, and one or more polishingor'finalsurfacing wheels beyond the secondary wheel, means for rotatingall of said wheels, means for elevating each of said wheels or setsthereof, and means for traversing the secondary surfacing and thefinal-polishing wheels horizontally,'for the purposes set forth.

22. In a lithographic-stone-surfacing machine, a bed and reciprocatingcarriage, a roughing-wheel rotatable thereover, secondary or surfacingwheels having their working bottoms of finer character than theroughingwheel arranged beyond such wheel, and movable individuallyhorizontally toward and away from each other, polishing orfinal-surfacing wheels beyond the secondary wheels movable horizontallytoward and away from each other, means for rotating all of said wheels,means for elevating each of said wheels or sets thereof, means fortraversing the secondary surfacing and the final-polishing wheelshorizontally, and means for distending or approaching the wheels of thesecondary and final sets and for holding them in their given relations,for the purposes set forth.

Signed by me at Springfield, Massachusetts, this 25th day of May, 1899.

CLARENDON G. XVARNER.

Witnesses:

WM. S. BnLLows, M. A. CAMPBELL.

